<?php
/**
 * Create and update agents.
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Application\Agent;

use Bookline\Domain\Agent\Agent;
use Bookline\Domain\Agent\AgentRepository;
use Bookline\Domain\Agent\AgentStatus;
use Bookline\Domain\Shared\Clock;
use Bookline\Domain\Shared\DomainException;
use Bookline\Domain\Shared\EmailAddress;
use Bookline\Domain\Shared\PhoneNumber;
use Bookline\Domain\Shared\TimeZoneId;
use Bookline\Domain\Shared\Uuid;

/**
 * Create, update and delete agents.
 */
final class MutateAgentHandler {

	/**
	 * Constructor.
	 *
	 * @param AgentRepository $agents Agent port.
	 * @param Clock           $clock  Clock.
	 */
	public function __construct(
		private readonly AgentRepository $agents,
		private readonly Clock $clock,
	) {}

	/**
	 * Create a new agent.
	 *
	 * @param array<string, mixed> $data Agent data.
	 * @return Agent
	 * @throws DomainException When validation fails, or when every named staff field is occupied.
	 */
	public function create( array $data ): Agent {
		$now = $this->clock->now();

		$agent = new Agent(
			null,
			Uuid::generate(),
			isset( $data['wp_user_id'] ) ? (int) $data['wp_user_id'] : null,
			trim( (string) ( $data['display_name'] ?? '' ) ),
			new EmailAddress( trim( (string) ( $data['email'] ?? '' ) ) ),
			isset( $data['phone'] ) && '' !== trim( (string) $data['phone'] ) ? new PhoneNumber( trim( (string) $data['phone'] ) ) : null,
			isset( $data['bio'] ) ? trim( (string) $data['bio'] ) : null,
			isset( $data['avatar_id'] ) ? (int) $data['avatar_id'] : null,
			new TimeZoneId( trim( (string) ( $data['timezone'] ?? 'Europe/London' ) ) ),
			isset( $data['status'] ) ? AgentStatus::from( (string) $data['status'] ) : AgentStatus::Active,
			isset( $data['colour'] ) && 1 === preg_match( '/^#[0-9A-Fa-f]{6}$/', (string) $data['colour'] ) ? (string) $data['colour'] : null,
			(int) ( $data['sort_order'] ?? 0 ),
			null,
			$now,
			$now,
		);

		$this->agents->save( $agent );
		return $agent;
	}

	/**
	 * Update an existing agent.
	 *
	 * @param int                  $id   Agent id.
	 * @param array<string, mixed> $data Agent data.
	 * @return Agent
	 * @throws DomainException When the agent is missing.
	 */
	public function update( int $id, array $data ): Agent {
		$agent = $this->agents->find_by_id( $id );
		if ( null === $agent ) {
			throw new DomainException( 'agent.not_found', 'Agent not found.' );
		}

		$now = $this->clock->now();

		$updated = new Agent(
			$agent->id(),
			$agent->uuid(),
			array_key_exists( 'wp_user_id', $data ) ? ( null !== $data['wp_user_id'] ? (int) $data['wp_user_id'] : null ) : $agent->wp_user_id(),
			array_key_exists( 'display_name', $data ) ? trim( (string) $data['display_name'] ) : $agent->display_name(),
			array_key_exists( 'email', $data ) ? new EmailAddress( trim( (string) $data['email'] ) ) : $agent->email(),
			array_key_exists( 'phone', $data ) ? ( null !== $data['phone'] && '' !== trim( (string) $data['phone'] ) ? new PhoneNumber( trim( (string) $data['phone'] ) ) : null ) : $agent->phone(),
			array_key_exists( 'bio', $data ) ? trim( (string) $data['bio'] ) : $agent->bio(),
			array_key_exists( 'avatar_id', $data ) ? ( null !== $data['avatar_id'] ? (int) $data['avatar_id'] : null ) : $agent->avatar_id(),
			array_key_exists( 'timezone', $data ) ? new TimeZoneId( trim( (string) $data['timezone'] ) ) : $agent->timezone(),
			array_key_exists( 'status', $data ) ? AgentStatus::from( (string) $data['status'] ) : $agent->status(),
			array_key_exists( 'colour', $data ) ? ( null !== $data['colour'] && 1 === preg_match( '/^#[0-9A-Fa-f]{6}$/', (string) $data['colour'] ) ? (string) $data['colour'] : null ) : $agent->colour(),
			array_key_exists( 'sort_order', $data ) ? (int) $data['sort_order'] : $agent->sort_order(),
			$agent->meta(),
			$agent->created_at(),
			$now,
		);

		$this->agents->save( $updated );
		return $updated;
	}

	/**
	 * Delete an agent (soft delete).
	 *
	 * @param int $id Agent id.
	 *
	 * @throws DomainException When the agent is missing.
	 */
	public function delete( int $id ): void {
		$agent = $this->agents->find_by_id( $id );
		if ( null === $agent ) {
			throw new DomainException( 'agent.not_found', 'Agent not found.' );
		}
		$this->agents->soft_delete( $agent, $this->clock->now() );
	}
}